#!/usr/bin/stap global traced_pid, command global pgout, bgwriteout, kupdate function log_event:long () { return (!traced_pid || traced_pid == pid()) } probe kernel.trace("mm_pdflush_bgwriteout") { if (!log_event()) next bgwriteout[pid()] <<< $count command[pid()] = execname() } probe kernel.trace("mm_pdflush_kupdate") { if (!log_event()) next kupdate[pid()] <<< $count command[pid()] = execname() } probe kernel.trace("mm_pagereclaim_pgout") { if (!log_event()) next pgout[pid()] <<< 1 command[pid()] = execname() } probe begin { printf("Starting data collection\n") traced_pid = target() if (traced_pid) printf("mode Specific Pid, traced pid: %d\n\n", traced_pid) else printf("mode - All Pids\n\n") } probe end, error { printf("Terminating data collection\n") printf("%-16s %6s %10s %10s %10s %10s %11s\n", "", "", "Pdflush", "Pdflush", "Kupdate", "Kupdate", "Pgout") printf("%-16s %6s %10s %10s %10s %10s %11s\n", "Command", "Pid", "count", "sum", "count", "sum", "count") printf("%-16s %6s %10s %10s %10s %10s %11s\n", "-------", "---", "-------", "-------", "-------", "-------", "-----") foreach (pid in command-) printf("%-16s %6d %10d %10d %10d %10d %11d\n", command[pid], pid, @count(bgwriteout[pid]), (@count(bgwriteout[pid]) ? @sum(bgwriteout[pid]) : 0), @count(kupdate[pid]), (@count(kupdate[pid]) ? @sum(kupdate[pid]) : 0), @count(pgout[pid])) }